HT Instruments MACROTESTG1 " Ground Resistance and Bonding Continuity Tester. " Features: Earth resistance and soil resistivity with 2/3/4 pole method Stackless earth ground resistance (with T2100 optional accessory) Power Analysis, Harmonic analysis up to 25th Continuity of protection conductors with 200mA Built-in WiFi interface to connect to iOS and Android devices USB interface to connect to the PC Color touch-screen display Help on-line Internal memory and Cloud Storage (trough iOS or Android device) Rechargeable NiMH batteries (external battery charger) Tech specs Continuity with 200mA Measuring range 0,01Ω÷99.9Ω Accuracy ±(5.0% reading + 3 digits) Test current > 200mA (R ≤ 2Ω) Open circuit voltage 4V ≤ V0≤ 12V Insulation resistance Test voltage 50, 100, 250, 500, 1000VDC Measuring range 0.01MΩ ÷ 99.9MΩ (50V)0.01MΩ ÷ 199.9MΩ (100V)0.01MΩ ÷ 499MΩ (250V)0.01MΩ ÷ 999MΩ (500V)0.01MΩ ÷ 1999MΩ (1000V) Basic accuracy ±(2.0% reading + 2 digits) Test current > 1mA on 1kΩ x Vnom (50,100, 250, 1kV)> 2.2mA on 230kΩ @ 500V Short circuit current Line/Loop Impedance (L-L, L-N, L-PE) Measuring range 0.01Ω ÷ 199.9Ω Resolution 0.01Ω min (0.1mΩ with optional accessory IMP57) Accuracy ±(5.0% reading + 3 digits) Test voltage 100÷265V (L-N) / 100÷460V (L-L), 50/60Hz Maximum test current 5.81A (@265V); 10.10A (@457V) Selectable MCB protections curves B, C, D, K Selectable fuse protections type aM and gG Insulating material (test I2t) PVC, butyl rubber, EPR, XLPE Earth resistance and ground resistivity Measuring range R 0.01Ω ÷ 49.99kΩ Measuring range 0.60Ωm÷3.14MΩm Accuracy ±(5.0%reading + 3digits) Test current 10mA, 77.5Hz Open circuit voltage 550 test (alKaline) Display 320x240 resistive color LCD with touch screen Memory 999 locations, 3 marker levels PC interface optical/USB and Wi-Fi (with optional accessory C2013) Dimensions (L x D x H) 225 x 165 x 75 mm / 8.8 x 6.5 x 2.9 in Weight (including batteries) 1.2 kg / 2.5 lb Safety IEC/EN61010-1, double insulation Pollution degree 2 Mechanical protection CAT III 240V, max 415V among inputs Reference standards IEC/EN61557-1-2-3-4-5-6-7 Working temperature 0°÷ 40°C / 32°÷104°F Working humidity